Rovibrational Energy Transitions and Coupled Chemical Reaction Modeling of H+H_{2} and He+H_{2} in DSMC

- Journal title : International Journal of Aeronautical and Space Sciences
- Volume 16, Issue 3, 2015, pp.347-359
- Publisher : The Korean Society for Aeronautical & Space Sciences
- DOI : 10.5139/IJASS.2015.16.3.347

Title & Authors

Rovibrational Energy Transitions and Coupled Chemical Reaction Modeling of H+H_{2} and He+H_{2} in DSMC

Kim, Jae Gang;

Kim, Jae Gang;

Abstract

A method of describing the rovibrational energy transitions and coupled chemical reactions in the direct simulation Monte Carlo (DSMC) calculations is constructed for and . First, the state-specific total cross sections for each rovibrational states are proposed to describe the state-resolved elastic collisions. The state-resolved method is constructed to describe the rotational-vibrational-translational (RVT) energy transitions and coupled chemical reactions by these state-specific total cross sections and the rovibrational state-to-state transition cross sections of bound-bound and bound-free transitions. The RVT energy transitions and coupled chemical reactions are calculated by the state-resolved method in various heat bath conditions without relying on a macroscopic properties and phenomenological models of the DSMC. In nonequilibrium heat bath calculations, the state-resolved method are validated with those of the master equation calculations and the existing shock-tube experimental data. In bound-free transitions, the parameters of the existing chemical reaction models of the DSMC are proposed through the calibrations in the thermochemical nonequilibrium conditions. When the bound-free transition component of the state-resolved method is replaced by the existing chemical reaction models, the same agreement can be obtained except total collision energy model.

Keywords

State-resolved method;RVT energy transition;Nonequilibrium Chemical Reaction;DSMC;

Language

English

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